Anchor for concrete construction.



uIT STATIMENT FRANKLIN CHATFIELD, OF -MINNEAPOLIS; MINNESOTA, ASSIGNOROE ONE-FOURTH- 1 are E. J. COUPER, onn-rounrn T 1*. n. sTownLL, AND ONE-FOURTH TO 0. L. PILLS- BURY, ALL or MINNEAPOLIS, 'ivrmivnsorn.

Auction-non CONCRETE consrnoc'rion.

To all whom concern I Be it known. that I. .FRAN'at'm "CHAT:-

-FIELD, of 'Minneapolis, Hennepin county,

manner the hangers of, shafting or the pipes of asprinkling system, 'or for any other analogous uses.

A further object: is to provide an anchor ing device which, will be invisible and hence 20 a large number of them-can be placed in the alter ceiling when molded to provide for future contingencies without marring the finishedappearance of thevwall. My invention consists generally in. an anchor adapted to be embedded in plastic material and comprising a. hubhaving legs adapted to rest upon the false work when l the concrete is poured, said hub being supported out of contact with the false work and adapted to support a hanger provided with a socket to recive a plug, the lower end of which is flush with the surface when the false work is removed. a f v In the accompanying drawing forming part of this specification, Figure l'is a sectional .view through a portion of a concrete. ce1l1ng,.show1ng the manner of arranging.

my invention therein, Fig. 2' isa top view of the anchor, Fig. 3"is a sectional view on the line w-m of Fig. 2.

In the drawing, 2 represents a concrete ceiling, 3 the metal reinforcing rods em-.

bodied therein and 4 the wooden. frame or false work upon which the concrete is poured in the'erection of the building.

. 5 is a hub having a tapered socket 6 in its upper end terminating in an 'interiorly threaded opening 7 in its lower end. A' series of legs 8, preferably three in number, radiate from the upper end of the hub and are downwardly turned and have feet 9 which rest upon the false work and are provided with horizonta'Lfianges 10 having recesses 11 between them to receive the shanks I Specification of I etters lfatenti' Application m Ma 5,1910. Serial no. 559,643.

' Pat entedApr.9,1912.

of nails by which the anchor isheld place, on the false work during the operationof pouring the cement. Suitable ma- 7 terial, such as cotton waste 12, is placed in the socket 6 to prevent the concrete from filling up the threaded hole and a wooden plug 13 ls-inserted into the threaded hole and extends down to the false work. This plug forms a core and is flush with the conmoved. 1

To use the anchor, the plug is bored out, exposing the threaded hole 7, sothat the threaded end of a bolt or hanger can be in.-

serted therein and securely and permanently supported from the concrete surface. The anchors-will be inserted among the rein forcing rods so that a considerable portion of the strain on the anchors will be sustained by these rods and in the erection of a building' I propose to arrangethese anchors at suitable intervals so that whenever desired they maybe utilized as a support for a shafting hanger. They also may be used for supporting the pipes of a sprinkler system. v a

The lower ends of the plugs, being flush with the surface of the concrete, will present a smooth, finished surface, the anchor socket being entirely concealed amtil such time as itsis desired to use it for supporting crete surface when the false work is reurposes. The plugwill thenbe removed p y any suitable means, as by boring, and the bolt'orhanger may then be insertedinto the exposed socket.

I prefer to provide three legs in connection with each anchor to give a three-point bearing, but in some instances this number maybe-varied, according to the location of the anchor.

I may also use the anchor in a side wall or in a column to perform the same functions as in a ceiling, the essential feature of the invention being ameans embedded in the concrete for attaching a supporting means thereto.

I regard this arrangement of the hub in the plastic body so that the plug in the lower end thereof will be flush with the surface of theconcrete, as an important feature of my invention, as itallowsthe use of a great number of these anchors in a ceiling or side wall, if preferred, without the necessity of the plugs projecting beyond the surface of the plastic body and presenting an unsightly and objectionable appearance.

I claim as my invention As a new article of manufacture, an anchor adapted to be embedded in a plastic material and comprising a hub having legs radiating therefrom and adapted to rest upon the false work when the concrete is poured, the lower end of said hub being supported by said legs out of contact with the false work and having a socket therein adapted to receive a ban er, and a removable plug fitting within said socket, the lower end of said plug extending into the plane of the outer extremities of the legs whereb 15 the outer end of the plug will lie flush wit the molded surface of plastic material upon the removal of the false work, and will normally conceal said hub socket.

In witness whereof, I have hereunto set 20 Witnesses:

RICHARD PAUL, J. A. BYRNES. 

